Answer:
They try to beat me, they try in vain. And when I win, I end the pain.
What force and strength cannot get through. I, with a gentle touch, can do. Many in the street would stand. Were I not a friend at hand.
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
A man parks his car outside of a hotel and immediately realises he is bankrupt. How did it happen?
Someone walked into a room and you heard a crash! Someone died. What happened?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.